scholarly journals A Comprehensive Analysis of DSTATCOM-Based Power Improvement

2021 ◽  
pp. 19-26
Author(s):  
Vidhyavati Suryawanshi ◽  
Dr. Surbhi Gupta
Keyword(s):  
Power Quality ◽  
Industrial Sector ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Arc Furnaces ◽  
Facts Devices ◽  
Utility Companies ◽  
In Series ◽  
Ac Transmission ◽  
Innovative Techniques

Power quality became one of the most critical challenges in today’s modern power system. Utmost primary factors of power quality issues are non-linear fluctuating loads, system interruption, load variances, infrequent loads, and arc furnaces. As a matter of fact, there is occurrence of various electrical distortions, along with voltage spikes, voltage sags, and so forth. Several innovative techniques were employed for the development of circuits which resulted in minimised voltage stability as well as reliability.  Utility companies which are electrical are receiving a large quantity of complaints because of these challenges.  An approach is required now to explore the power quality challenges in industrial sector, corporate sector, municipal, or domestic sites. Therefore, a few techniques known as Flexible AC transmission system (FACTs) are used to enhance power quality. It is divided into two categories: namely series-FACTs and shunt-FACTS. As name itself define its architecture that in series-FACTS comprised of transmission line which is connected in series with module and connected in parallel in shun-FACTs.   We can alleviate the problems related to power quality with the help of these FACTS devices. D-STATCOM is one of the better devices available. D-STATCOM is a shunt-connected solid-state device employed at the distribution network to maintain load-side disturbances. It has exceeded the traditional capacitor being used improve power quality with it's lower upfront investment, outstanding dynamics, absence of static, and lower operational expenses. The sorts, architectural style, operating, control systems, and AI are all described in this article.

Congestion management in deregulated power system using hybrid cat-firefly algorithm with TCSC and SVC FACTS devices

2016 ◽  
Vol 35 (5) ◽  
pp. 1524-1537 ◽  
Author(s):  
Naraina Avudayappan ◽  
S.N. Deepa
Keyword(s):  
Power System ◽  
Congestion Management ◽  
Power Line ◽  
Transmission System ◽  
Optimal Placement ◽  
Content Type ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Facts Devices ◽  
Ac Transmission

Purpose The loading and power variations in the power system, especially for the peak hours have abundant concussion on the loading patterns of the open access transmission system. During such unconditional state of loading the transmission line parameters and the line voltages show a substandard profile, which depicts exaction of congestion management of the power line in such events. The purpose of this paper is to present an uncomplicated and economical model for congestion management using flexible AC transmission system (FACTS) devices. Design/methodology/approach The approach desires a two-step procedure, first by optimal placement of thyristor controlled series capacitor (TCSC) and static VAR compensator (SVC) as FACTS devices in the network; second tuning the control parameters to their optimized values. The optimal location and tuning of TCSC and SVC represents a hectic optimization problem, due to its multi-objective and constrained nature. Hence, a reassuring heuristic optimization algorithm inspired by behavior of cat and firefly is employed to find the optimal placement and tuning of TCSC and SVC. Findings The effectiveness of the proposed model is tested through simulation on standard IEEE 14-bus system. The proposed approach proves to be better than the earlier existing approaches in the literature. Research limitations/implications With the completed simulation and results, it is proved that the proposed scheme has reduced the congestion in line, thereby increasing the voltage stability along with improved loading capability for the congested lines. Practical implications The usefulness of the proposed scheme is justified with the computed results, giving convenience for implementation to any practical transmission network. Originality/value This paper fulfills an identified need to study exaction of congestion management of the power line.

RELIABILITY MANAGEMENT AND IMPROVEMENT FOR PLANNING AND OPERATIONAL PROCESS ENHANCEMENT MEASURES IN DEREGULATED POWER SYSTEMS USING ATC

2010 ◽  
Vol 17 (03) ◽  
pp. 275-289
Author(s):  
V. VIJAY VENU ◽  
A. K. VERMA
Keyword(s):  
Power Systems ◽  
Planning Horizon ◽  
Available Transfer Capability ◽  
Reliability Management ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Facts Devices ◽  
Transfer Capability ◽  
Ac Transmission ◽  
Deregulated Power Systems

In this paper, beginning with a concise overview of the Available Transfer Capability (ATC) evaluation methods, we make a proposition for reliability management in the planning horizon of deregulated power systems through the concept of Adequacy Resiliency. The derived indices are meant as indicators of adaptability of power systems to ensure the required reliability levels. Improvements to this conceptualization upon the deployment of Flexible AC Transmission System (FACTS) devices are then put forward. We also explore the option of employing the created indices to the operational horizon of power systems, explaining the means of market enhancement. Core reliability issues arising out of the usage of FACTS are then discussed.

scholarly journals Modelling of Transformerless Upfc Toimprovepower System Stability using Optimization Technique

2019 ◽  
Vol 8 (4) ◽  
pp. 11456-11459
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Optimization Technique ◽  
System Stability ◽  
Unified Power Flow Controller ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Facts Devices ◽  
Ac Transmission ◽  
Power Flow Controller

Generally, power system faces the problem to transfer power from one system to another system without any fluctuations, with minimal of system losses. To overcome this problems, a flexible ac transmission system is implemented in this paper. In present scenario, facts devices are used to reduce the transmission losses for improvising transmission capacity and also to improve the system capability. Unified Power Flow Controller plays a most prominent role in FACTS controller to improve the system stability. The structure of UPFC is combination of back-back converters with boosting and zigzag transformer. This type of UPFC system consists of high losses due to presence of magnetic properties in this transformer. With this, a transformer-less multilevel inverter based UPFC topology is proposed in this paper. This paper focuses on the modulation of transformerless UPFC with PSO, which controlsfundamental frequency for better controlling of active and reactive power, harmonic minimization, and improvement in efficiency of system by controlling DC link voltage

scholarly journals Power Quality Services Provided by Virtually Synchronous FACTS

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3292 ◽  
Author(s):  
Andres Tarraso ◽  
Ngoc-Bao Lai ◽  
Gregory N. Baltas ◽  
Pedro Rodriguez
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Electrical Networks ◽  
Efficient Operation ◽  
Flexible Ac Transmission ◽  
Facts Devices ◽  
Voltage Quality ◽  
Critical Issues ◽  
Harmonics Flow ◽  
Ac Transmission

The variable and unpredictable behavior of renewable energies impacts the performance of power systems negatively, threatening their stability and hindering their efficient operation. Flexible ac transmission systems (FACTS) devices are able to emulate the connection of parallel and series impedances in the transmission system, which improves the regulation of power systems with a high share of renewables, avoiding congestions, enhancing their response in front of contingencies and, in summary, increasing their utilization and reliability. Proper control of voltage and current under distorted and unbalanced transient grid conditions is one of the most critical issues in the control of FACTS devices to emulate such apparent impedances. This paper describes how the synchronous power controller (SPC) can be used to implement virtually synchronous FACTS. It presents the SPC functionalities, emphasizing in particular the importance of virtual admittance emulation by FACTS devices in order to control transient unbalanced currents during faults and attenuate harmonics. Finally, the results demonstrate the effectiveness of SPC-based FACTS devices in improving power quality of electrical networks. This is a result of their contribution to voltage balancing at point of connection during asymmetrical faults and the improvement of grid voltage quality by controlling harmonics flow.

Congestion mitigation on high voltage power lines using multiple TCSC & UPFC

2015 ◽  
Vol 06 (02) ◽  
pp. 1550023
Author(s):  
Anwar S. Siddiqui ◽  
Tanmoy Deb
Keyword(s):  
High Voltage ◽  
Transmission Lines ◽  
Power Flow ◽  
Power Transmission ◽  
Power Transmission Lines ◽  
Congestion Mitigation ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Facts Devices ◽  
Ac Transmission

With severe overload on transmission lines, further exchange of power flow is affected due to congestion on power transmission lines. This paper investigates the effect of Flexible AC Transmission System (FACTS) devices like TCSC and UPFC in congestion mitigation. The proposal uses multiple FACTS devices of similar type and investigates their effect on congestion mitigation in high voltage transmission lines. This proposal is tested on IEEE-14 bus system.

scholarly journals DISTRIBUTED STATIC SERIES COMPENSATOR (DSSC) APPLICATION TO POWER SYSTEM- A REVIEW

2013 ◽  
pp. 151-154
Author(s):  
P. P. TAMBE ◽  
K. D. JOSHI
Keyword(s):  
High Speed ◽  
Power Flow ◽  
Electric Energy ◽  
Power Flow Control ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
System A ◽  
Facts Devices ◽  
Ac Transmission ◽  
Distributed Facts

This paper is showcasing review of distributed static series compensator ( DSSC) & explains the effect of insertion of DSSC in transmission line power flow control. FACTS ( Flexible AC Transmission System) technology the aspect of Power Electronics offers High speed & reliability of switching & thus the value of electric energy is enhance. Along with merits there are certain problems offered by FACTS technology which leads to complexity in operation & overall cost investment becomes large. The solution to this is DFACTS technology i.e Distributed FACTS devices can be used in distributed position and DSSC belongs to DFACTS family.

scholarly journals POWER QUALITY IMPROVEMENT USING CUCKOO SEARCH BASED MULTI-LEVEL FACTS CONTROLLER

2021 ◽  
Author(s):  
B. Srinivasa Rao ◽  
◽  
D. Vijaya Kumar ◽  
K. Kiran Kumar ◽  
◽  
...  
Keyword(s):  
Power System ◽  
Power Quality ◽  
Optimization Technique ◽  
Cuckoo Search ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Power Quality Improvement ◽  
Power Quality Conditioner ◽  
Ac Transmission ◽  
Harmonic Distortions

Nowadays, the improvement of power quality is the major concern in power system scenario. These problems mainly caused due to utilization of different load conditions to the power system. To mitigate these problems different methods are implemented in literature. As per literature analysis the one of the Flexible AC Transmission System called as unified power quality conditioner (UPQC) plays a key role. The series and shunt controllers of UPQC designed with 9-level inverters to reduce the harmonic distortions. An instantaneous PQ theory is used to generate the reference signals required for series and shunt controllers along with dq-transformation analysis. A Cuckoo optimization technique is used to tune the parameters of PI controller in shunt controller to achieve better harmonic distortions and improve power quality. This proposed system is to be tested and verified in MATLAB/SIMULINK.

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